公开(公告)号：US12235442B2

公开(公告)日：2025-02-25

申请号：US18245401

申请日：2021-09-02

Applicant: SONY GROUP CORPORATION

Inventor： Ryo Ogawa ,  Yuki Mamishin ,  Takuro Noda

IPC: G06F3/01 ,  G02B5/30 ,  G02B5/32 ,  G02B27/00

Abstract: A line-of-sight detection device capable of achieving further improvement in line-of-sight detection accuracy, achieving low latency, and achieving low power consumption is provided. A line-of-sight detection device includes an imaging element, an illumination unit that illuminates an eyeball with a plurality of beams of illumination light, an optical element that guides respective beams of reflected light in a plurality of directions from the eyeball caused by the plurality of beams of illumination light to a direction of the imaging element, an optical system that causes the imaging element to non-selectively receive the beams of reflected light in the plurality of directions from the eyeball, and a calculation unit that converts, on the basis of the beams of reflected light in the plurality of directions from the eyeball received by the imaging element, the beams of reflected light into information of eyeball movement and/or positional information of a pupil.

公开(公告)号：US12231749B2

公开(公告)日：2025-02-18

申请号：US17865223

申请日：2022-07-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Lu Lu ,  Xinqiao Liu ,  Hao Yu ,  Junren Wang

IPC: H04N23/11 ,  G02B1/00 ,  G02B3/00 ,  G02B5/20 ,  G02B5/30 ,  G02B5/32 ,  H04N23/00

Abstract: Imaging systems, cameras, and image sensors of this disclosure include imaging pixels that include subpixels. Diffractive optical elements such as a metasurface lens layers or a liquid crystal polarization hologram (LCPH) are configured to focus image light to the subpixels of the imaging pixels.

公开(公告)号：US20250053016A1

公开(公告)日：2025-02-13

申请号：US18926112

申请日：2024-10-24

Applicant: Apple Inc.

Inventor： Se Baek Oh ,  Bradley C. Steele ,  Byron R. Cocilovo ,  Francesco Aieta ,  Graham B. Myhre

IPC: G02B27/01 ,  G02B5/08 ,  G02B5/18 ,  G02B5/32 ,  G02B27/09

Abstract: An electronic device may include a display that produce images. The display may generate light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide that propagates the light in a first direction towards the output coupler. The output coupler may couple the light out of the waveguide towards the eye box while inverting a parity of the light about the first direction. The coupler may include a first element such as a set of partial mirrors or diffractive gratings that redirects a first portion of the light in a second direction. The coupler may include a second element that redirects a second portion of the light in a third direction opposite the second direction. The first element may redirect the second portion and the second element may redirect the first portion towards the eye box.

公开(公告)号：US12169296B2

公开(公告)日：2024-12-17

申请号：US17628054

申请日：2021-04-29

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Wei Wei

IPC: G02B5/08 ,  G02B1/14 ,  G02B5/00 ,  G02B5/32

Abstract: An embodiment of the present disclosure provides a display apparatus, including: a display panel and a functional substrate that is located on a light exit side of the display panel; the functional substrate includes: a transparent substrate configured to have a first total reflection angle; a specular reflection layer located on a side of the transparent substrate; and a holographic film layer located between the transparent substrate and the specular reflection layer and configured so that a part of incident light, of which the propagation direction faces towards the transparent substrate and the incident angle is within a first incident angle range, is diffracted and is emitted to the transparent substrate at a first exit angle, the first exit angle being greater than or equal to the first total reflection angle. Further provided are a preparation method for a display apparatus and a smart mirror.

公开(公告)号：US20240402402A1

公开(公告)日：2024-12-05

申请号：US18678585

申请日：2024-05-30

Applicant: Light Field Lab, Inc.

Inventor： Jonathan Sean Karafin ,  Brendan Elwood Bevensee

IPC: G02B5/02 ,  F24S30/00 ,  F24V30/00 ,  G02B3/00 ,  G02B3/08 ,  G02B5/32 ,  G02B6/04 ,  G02B6/06 ,  G02B6/10 ,  G02B27/01 ,  G02B27/09 ,  G02B30/00 ,  G02B30/56 ,  G03H1/02

Abstract: Disclosed are systems for directing energy according to holographic projection. Configurations of waveguide arrays are disclosed for improved efficiency and resolution of propagated energy through tessellation of shaped energy waveguides.

公开(公告)号：US12158581B1

公开(公告)日：2024-12-03

申请号：US17390535

申请日：2021-07-30

Applicant: Apple Inc.

Inventor： Mark R. Ayres ,  Adam C. Urness ,  Jaebum Chung

IPC: G02B27/01 ,  G02B5/32 ,  G03H1/02 ,  G03H1/04 ,  G03H1/08

Abstract: An electronic device may provide images to an eye box. The device may include first and second sets of holograms that sequentially diffract light along an optical path. Each hologram in the first set may have a respective grating vector oriented along a common axis. Each of the grating vectors may have a respective magnitude. The magnitudes may be non-uniformly spaced across the first set of volume holograms. Similarly, each hologram in the second set may have a respective additional grating vector oriented along an additional common axis. Each of the additional grating vectors may have a respective additional magnitude. The additional magnitudes may be non-uniformly spaced across the second set of holograms. This may serve to produce diffracted light within filaments of k-space that mitigate angular harmonic sight lines in angle space, thereby preventing formation of non-uniformities in the images at the eye box.

公开(公告)号：US12147046B2

公开(公告)日：2024-11-19

申请号：US17894052

申请日：2022-08-23

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Andrew Maimone ,  Junren Wang ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B5/18 ,  G02B5/32 ,  G02B17/00 ,  G02B27/00 ,  G02B27/02 ,  G02B27/10 ,  G02B27/14 ,  G02B27/28 ,  G02B27/48

Abstract: An optical device for a head-mounted display device includes a first partial reflector and a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light. At least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector. At least one of the first partial reflector or the second partial reflector includes a reflective holographic element.

公开(公告)号：US12124033B2

公开(公告)日：2024-10-22

申请号：US17607196

申请日：2020-10-06

Applicant: LG Chem, Ltd.

Inventor： Eun Ho Kho ,  Jae Jin Kim ,  Bu Gon Shin ,  Dae Han Seo ,  Min Soo Song

IPC: G02B27/01 ,  F21V8/00 ,  G02B5/32

CPC classification number: G02B27/0103 ,  G02B5/32 ,  G02B6/0023 ,  G02B6/005 ,  G02B27/0101

Abstract: A holographic waveguide includes a light guide unit configured to guide lights; a first holographic optical element disposed on one surface or the other surface of the light guide unit and configured to diffract an input light; a second holographic optical element disposed on any one of the one surface and the other surface, and configured to receive a light diffracted by the first holographic optical element and to direct a part of the received light to the other one of the one surface and the other surface; a third holographic optical element disposed on a surface, and configured to receive diffracted lights by the second holographic optical element and to guide the lights; and a fourth holographic optical element configured to receive a diffracted light by the third holographic optical element, and to allow the light to be output from the light guide unit.

公开(公告)号：US20240329289A1

公开(公告)日：2024-10-03

申请号：US18620834

申请日：2024-03-28

Applicant: DigiLens Inc.

Inventor： Alastair John Grant ,  Milan Momcilo Popovich

IPC: G02B5/32 ,  G03H1/04

CPC classification number: G02B5/32 ,  G03H1/0402 ,  G02B2207/101 ,  G03H2001/0439 ,  G03H2223/25 ,  G03H2240/11 ,  G03H2250/32

Abstract: A method for recording a diffractive nanostructure is provided. The method includes: providing a holographic recording mixture including a monomer, an inert material, and a photoinitiator; depositing a layer of the mixture onto a substrate; exposing the mixture to a holographic recording beam to form a nanostructure of polymer regions and inert material regions within the mixture layer; and depositing a surface-conditioning optical layer on top of the nanostructure after curing of the expose mixture.

公开(公告)号：US20240319483A1

公开(公告)日：2024-09-26

申请号：US18365203

申请日：2023-08-03

Applicant: National Central University

Inventor： Wen-Hsin SUN ,  Wei-Chia SU ,  Jun-Yi YU ,  Ching-Cherng SUN

IPC: G02B13/16 ,  G02B5/32 ,  G02B27/01

CPC classification number: G02B13/16 ,  G02B5/32 ,  G02B27/0172 ,  G02B2027/0107 ,  G02B2027/0174

Abstract: A volume holographic optical element projection system includes a projection lens, a polarizing beam splitter, a liquid crystal on silicon panel, and a volume holographic optical element. The projection lens includes a light incident side, a light emitting side, and nine lenses. A f-number of the projection lens is in a range from 1 to 3. The f-number is a value derived from dividing the focal length by the entrance pupil diameter. The liquid crystal on silicon panel includes a protection glass. The polarizing beam splitter is located between the light incident side of the projection lens and the protection glass of the liquid crystal on silicon panel. The light emitting side of the projection lens faces the volume holographic optical element.